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Knowledge Base & Operational DocumentationHow to Diagnose a Website That Returns Intermittent 502 Errors
11/10/2026
Intermittent 502 responses can occur when a gateway cannot reach an application worker or receives an invalid upstream response. A healthy homepage test may miss brief failures.
What to check
Correlate gateway and application logs, worker restarts, connection timeouts, resource pressure, and upstream health. Record request IDs and timestamps for affected examples.
Recommended next step
Identify the failing dependency and monitor error rate through a representative traffic period. Informatix Systems can investigate hosting and web application reliability.